I was JUST pondering this very thing the other night!
As for my answer.... gosh that's a toughie. I can see both points of view.
On one hand, I don't think it's the best idea b/c [so far] I've yet to come close to actually buying one of the bags that part of any designers' Target line. So I think to myself, what does that say?
On the other hand, I do think it goes give the designer exposure to many people who have probably never even heard of the brand prior. It also enables individuals who cannot afford a designer bag the chance to own one for less, which I think is great. Being a poor college student I can really relate to that, and empathize.
So I guess overall, I wouldn't mind if RM did a line for Target. The way I see it, is if I'm not a fan of the pieces (which would most likely be the case b/c tPF has made me so leather obsessed that I rarely like a pvc bag) then I simply do not have to buy them. Plain and simple. The fact a line was done wouldn't change my opinion RM. As long as she keeps making beautiful leather designs I'm golden.